1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface
 4 *
 5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
 6 * Copyright (C) 2006 Applied Data Systems
 7 *
 8 * Rewritten for the SoC audio subsystem (Based on PXA2xx code):
 9 *   Copyright (c) 2008 Ryan Mallon
 
 
 
 
10 */
11
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/platform_device.h>
15#include <linux/dmaengine.h>
16
17#include <sound/pcm.h>
18#include <sound/soc.h>
19#include <sound/dmaengine_pcm.h>
20
21#include <linux/platform_data/dma-ep93xx.h>
22
23#include "ep93xx-pcm.h"
24
25static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
26	.info			= (SNDRV_PCM_INFO_MMAP		|
27				   SNDRV_PCM_INFO_MMAP_VALID	|
28				   SNDRV_PCM_INFO_INTERLEAVED	|
29				   SNDRV_PCM_INFO_BLOCK_TRANSFER),
30	.buffer_bytes_max	= 131072,
31	.period_bytes_min	= 32,
32	.period_bytes_max	= 32768,
33	.periods_min		= 1,
34	.periods_max		= 32,
35	.fifo_size		= 32,
36};
37
38static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
39{
40	struct ep93xx_dma_data *data = filter_param;
41
42	if (data->direction == ep93xx_dma_chan_direction(chan)) {
43		chan->private = data;
44		return true;
45	}
46
47	return false;
48}
49
50static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = {
51	.pcm_hardware = &ep93xx_pcm_hardware,
52	.compat_filter_fn = ep93xx_pcm_dma_filter,
53	.prealloc_buffer_size = 131072,
54};
55
56int devm_ep93xx_pcm_platform_register(struct device *dev)
57{
58	return devm_snd_dmaengine_pcm_register(dev,
59		&ep93xx_dmaengine_pcm_config,
60		SND_DMAENGINE_PCM_FLAG_NO_DT |
61		SND_DMAENGINE_PCM_FLAG_COMPAT);
62}
63EXPORT_SYMBOL_GPL(devm_ep93xx_pcm_platform_register);
64
65MODULE_AUTHOR("Ryan Mallon");
66MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
67MODULE_LICENSE("GPL");

 
 1/*
 2 * linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface
 3 *
 4 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
 5 * Copyright (C) 2006 Applied Data Systems
 6 *
 7 * Rewritten for the SoC audio subsystem (Based on PXA2xx code):
 8 *   Copyright (c) 2008 Ryan Mallon
 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/platform_device.h>
18#include <linux/dmaengine.h>
19
20#include <sound/pcm.h>
21#include <sound/soc.h>
22#include <sound/dmaengine_pcm.h>
23
24#include <linux/platform_data/dma-ep93xx.h>
25
26#include "ep93xx-pcm.h"
27
28static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
29	.info			= (SNDRV_PCM_INFO_MMAP		|
30				   SNDRV_PCM_INFO_MMAP_VALID	|
31				   SNDRV_PCM_INFO_INTERLEAVED	|
32				   SNDRV_PCM_INFO_BLOCK_TRANSFER),
33	.buffer_bytes_max	= 131072,
34	.period_bytes_min	= 32,
35	.period_bytes_max	= 32768,
36	.periods_min		= 1,
37	.periods_max		= 32,
38	.fifo_size		= 32,
39};
40
41static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
42{
43	struct ep93xx_dma_data *data = filter_param;
44
45	if (data->direction == ep93xx_dma_chan_direction(chan)) {
46		chan->private = data;
47		return true;
48	}
49
50	return false;
51}
52
53static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = {
54	.pcm_hardware = &ep93xx_pcm_hardware,
55	.compat_filter_fn = ep93xx_pcm_dma_filter,
56	.prealloc_buffer_size = 131072,
57};
58
59int devm_ep93xx_pcm_platform_register(struct device *dev)
60{
61	return devm_snd_dmaengine_pcm_register(dev,
62		&ep93xx_dmaengine_pcm_config,
63		SND_DMAENGINE_PCM_FLAG_NO_DT |
64		SND_DMAENGINE_PCM_FLAG_COMPAT);
65}
66EXPORT_SYMBOL_GPL(devm_ep93xx_pcm_platform_register);
67
68MODULE_AUTHOR("Ryan Mallon");
69MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
70MODULE_LICENSE("GPL");